Unity Flight Simulator Phase 2 is taking the Unity Flight Simulator Tutorial a little further, by adding sounds to collisions, sounds to particles, and allowing control of particles with keyboard input.
All of the scripts used in this tutorial are available at http://www.3dcognition.com/unity-flight-simulator-phase-2/
The model for the flying vehicle is available at no cost at http://www.3dcognition.com/unity-flight-simulator-assets/
See www.3dcognition.com for previous and related HTML and video tutorials.